One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,4)(5,6)(7,8)(17,18,22,28)(19,29,32,24)(20,33,35,26)(21,27,23,25)(30,40,34,43)(31,41,37,39)(36,44,38,42)(45,48,46,47)(2,6)(4,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,24)(20,34)(21,37)(22,32)(23,31)(25,39)(26,43)(27,41)(28,29)(30,35)(33,40)(36,45)(38,46)(42,48)(44,47) involution — undirected(1,3)(2,7)(4,6)(5,8)(9,11)(10,13)(12,16)(14,15)(18,25)(20,35)(21,23)(24,39)(26,44)(27,28)(29,41)(30,34)(31,37)(33,42)(40,48)(43,47) involution — undirected(2,6)(3,8)(11,16)(13,15)(17,20,22,35)(18,26,28,33)(19,30,32,34)(21,38,23,36)(24,40,29,43)(25,42,27,44)(31,46,37,45)(39,47,41,48)(1,4,5,7)(2,3,6,8)(10,14)(13,15)(17,21,22,23)(18,27,28,25)(19,31,32,37)(20,36,35,38)(24,39,29,41)(26,42,33,44)(30,45,34,46)(40,48,43,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.